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#pragma once
#include "Configuration/UnityConfigure.h"
#if ENABLE_TERRAIN
#include "TreeDatabase.h"
#include "Runtime/Math/Rect.h"
#include <vector>
class RenderTexture;
class Camera;
class ImposterRenderTexture
{
public:
ImposterRenderTexture(const TreeDatabase& treeDB);
~ImposterRenderTexture();
const Rectf& GetArea(int index) const {
return m_Areas[index];
}
RenderTexture* GetTexture() const { return m_Texture; }
bool GetSupported() const { return m_Supported; }
void UpdateImposters(const Camera& mainCamera);
void InvalidateAngles ()
{
m_AngleX = std::numeric_limits<float>::infinity();
m_AngleY = std::numeric_limits<float>::infinity();
}
const Matrix4x4f& getCameraOrientation() const { return m_CameraOrientationMatrix; }
void GetBillboardParams(float& angleFactor, float& offsetFactor) const;
private:
void UpdateImposter(const Rectf& rect, const TreeDatabase::Prototype& prototype);
private:
const TreeDatabase& m_TreeDatabase;
std::vector<Rectf> m_Areas;
Camera* m_Camera;
RenderTexture* m_Texture;
bool m_Supported;
float m_AngleX;
float m_AngleY;
int m_ImposterHeight;
int m_MaxImposterSize;
Matrix4x4f m_CameraOrientationMatrix;
static void InvalidateRenderTexture(void* userData) {
((ImposterRenderTexture*)userData)->InvalidateAngles();
}
};
#endif // ENABLE_TERRAIN
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